"There’s a massive sense of achievement ... as the team has delivered two large sections of HMS Queen Elizabeth in less than four weeks," said Steven Carroll, the project director.

"I am very proud of the team’s achievements, with both blocks departing on time and built to an exceptional standard, which is testament to the skills of our workforce here."

Mr Carroll has said up to 14,000 people are working on the project in terms of the construction, design and manufacturing and supply of materials.

The ships are being delivered by the Aircraft Carrier Alliance, a partnership between BAE Systems, Thales UK, Babcock and the Ministry of Defence.

On Friday a team of 50 cyclists from across the Aircraft Carrier Alliance are embarking on a 500 miles cycle charity ride, from Portsmouth to Rosyth.

The team, who aim to complete the journey in a faster time than the boat journey, will raise funds for the Royal Navy and Royal Marines Charity and are only stopping for rest in Northampton, Sheffield, Durham and Berwick.

The ship is due to be completed by 2016, with another aircraft carrier, HMS Prince of Wales, following later.

Each of the carriers will be utilised by all three sectors of the Armed Forces and will provide a four-acre operating base which can be deployed worldwide, and will be able to be used in battle and to provide humanitarian aid and disaster relief.